﻿// 
// TextChangeRange.cs
// 
// Author:
//   Matt Ward <ward.matt@gmail.com>
// 
// Copyright (C) 2013 Matthew Ward
// 
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System;

namespace ICSharpCode.TypeScriptBinding.Hosting
{
	public class TextChangeRange
	{
		public static TextChangeRange unchanged = new TextChangeRange(new TextSpan(0, 0), 0);
		
		public TextChangeRange(int start, int length, int newLength)
			: this(new TextSpan(start, length), newLength)
		{
		}
		
		public TextChangeRange(TextSpan span, int newLength)
		{
			this.span = span;
			this.newLength = newLength;
		}
		
		public TextSpan span { get; set; }
		public int newLength { get; set; }
		
		public TextSpan newSpan()
		{
			return new TextSpan(span.start, newLength);
		}
		
		public bool isUnchanged()
		{
			return span.isEmpty() && newLength == 0;
		}
	}
}
